I purchased a new Cannondale Synapse Alloy 6 in early March. I have roughly 250 miles on it. After the first 100 miles I took it back to my LBS to have it adjusted and tightened up. Before I did this, it would creak a fair amount when pedaling hard or shifting my weight around on the bike. The 100 mile adjustment didn't seem to help this. I know my LBS actually did what they were supposed to do because I watched them. I can't really tell where the creaks are coming from, but it's in multiple places. One place it seems to be a bit noisy is in the crank.
I would think that for the $1100 I paid for this bike, it should be absolutely silent. Is this normal for my type of bike?